Fastener



April 28, 1925. y 1,535,983

F. s. CARR FASTENER Filed Jan. 22, 1924 @y MWA/Mq.

agi/135g@ Patented Apr. 28, 1925.

UNITED STATES PATENT oFFlcE.

FRED S. CARR, OF NEWTON, MASSACHUSETTS, ASSIGNOR TO CARR FASTENER COM- PANY, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

FASTENER.

Applicatonvled January 22, 1924. Serial No. 687,753.

To all whom t may concern.'

Be it known that I, FRED S. CARR, a cit'- izen o'f the United States, and resident of Newton, in the county of Middlesex, State of Massachusetts, have invented an Improvement in Fasteners, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention aims to provide an improved separable fastener', particularly y though not exclusively useful for securing' carpets and the like to floors.

ln the drawings, which illustrate a preferred/form of my invention Figure l isa plan View of one corner of a carpet;

Fig. 2 is a section on the line 2,-2 of: Fig. 1; y

I Fig. 3 is a top plan view ot the socket;

Fig. 4t is a bottom plan view ot' the socket;

Fig. 5 is a section 011 the` line 5-5 of Fig. 3; and

Fig. 6 is a, section on the line G-G of Fig. 4. l

Referring to the drawings, the preferredl form of my invention illustrated shows the usual stud having a head1, a'neck 2, a base portion 3, and a screw 4 to be secured to the.

fioor 5 of an automobile or the likeV to hold the stud in the desired position.

The preferred form of socket is pressed 'from a single sheet of metaland has an outer cylindrical wall`6 presenting a plurality ot' upstanding attaching prongs 7, genl orally like those shown in my co-pending application Serial No. 687,7 52 filed herewith. A second and inner cylindrical wall 8 is provided to present a plurality of radially extending resilient fingers 9 having reversely bent neck-engaging portions 10 surrounding a stud-receiving aperture 11. The inner and outer cylidrical walls are connected atthe bottomoi the socket by a web 12. The resilient fingers 9 are connected at their outer ends to the inner cylindrical wall 8, and these fingers preferably curve downwardly from their points of attachment to the inner wall 8 to a lowpoint about midway of the` fingers and then curve upwardly again so that the reversely bent neck-engaging portions 10 Will be located upon the same general plane as the outer ends of the fingers 9. Thus the resilient fingers are free to flex with attendant engagement of the stud-receiving aperture ll to permit passage therethrough of the head l of the stud vwhen said head is being engaged in or disengaged from the socket. The curve of the resilient fingers greatly increases their strength and their very considerable length greatly decreases the amount which the metal adjacent their outer ends must flex during engagement and disengagement of the stud.

The socket is attached to the warp and weft threads of the carpet and the prongs are concealed by the pile of the carpet in much the same manner as described in Imy ,copending application above referred to.

The prongs, extending outwardly from the casing, do not interfere with free upward movementot the stud-engaging ting-ers during the entrance ot the stud into the socket,'and do not hold the carpet backing so closely and firmly against the `top ot' the socket as to interfere with this movement of the lingers, asn would be likely to be the case were the prongs thrown inwardly instead of outwardly.

`When the socket is engaged with the stud. the web 12 is seated against the 4floor 5 ol the automobile, and the space provided between the floor 5 and the res'lient prongs 9 proves a convenient recess for the base 3 of the stud, thus doing away with the countersinking of the base of the stud into the' fioor, as is desirable with known types of sockets. The inner and outer eylindrical walls provide a very rigid and substantial support for the attaching prongs 7 and for the resilient fingers 9, while they prevent possible crushing ot the casing or daniage to the resilient fingers when thepcarpet is stepped on directly overthe Jfastener. The socket may be separated from the stud by an -upward pull upon the carpet. separation being relatively easily effected because the outer portions ot the resilient` lOt plane of the neck-engaging portions 10, the entrance of the stud into the socket would be difficult, and the life of the socket short, because the stud-receiving aperture would initially contract when pressed against tlie head of the stud. Conversely, if the plane of the outer portion of the fingers were substantially below the general plane of the neck-engaging portions 10, the disengagement of the stud from the socket would be difficult, and the life of the socket short, because the walls of the stud-engaging aperture would tend to contract and more tightly grip the head of the stud when disengaging strain was applied. By locating the outer portions of the fingers in substantially the same plane as the stud-engaging portions 10, which constitute the wall of the stud-receiving aperture, any movement of the inner ends of the fingers, either Yabove or below this plane, increases the area of the stud-receiving aperture with resultant ease in both the engaging and disengaging operations.

While I have shown and described a preferred form of one embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal lof parts, and even changes in the mode of operation, may be madewithout departing from the scope of my invention, which is best defined in the following claims.

Claims.

l. A carpet fastener socket comprising a casing presenting an outer cylindrical wall, an inner cylindrical wall, a web connecting said outer and inner walls, a plurality of stud-engaging fingers surrounding a studreceiving aperture, and a plurality of attaching prongs extending upwardly from said outercylindrical wall.

2. A carpet fastener socket comprising a casing including an upstanding annular wall, a plurality of resilient stud-engaging fingers extending inwardly from the upper periphery of said wall, andy a plurality of attaching prongs extending upwardly from the periphery of said casing.

3. A carpet fastener socket comprising a casing presenting an annular wall, a plurality of resilient stud-engaging fingers extending inwardly from said wall, and reversely bent neck-engaging portions located at the inner ends of said fingers and providing a peripheral wall surrounding a studreceiving aperture, the outer ends of said fingers and the neck-engaging""portions thereof located substantially in the same horizontal plane, thereby permitting expansion of said stud-receiving aperture by pressure exerted upon said fingers either in anupward or downward direction.

4. A carpet fastener socket comprising a one-piece casing including inner and outer annular parallel walls, a web connecting said parallel walls, the bottom of said web providing the supporting surface of said socket,

and a plurality of resilient fingers extending inwardly from the upper periphery of the inner wall.

5. A carpet fastener socket presenting a plurality of resilient fingers surrounding a stud-receiving aperture, an inner cylindrical wall supporting said resilient fingers, an outer cylindrical wall surrounding said inner cylindrical wall and a web connecting the bottoms of said cylindrical walls.

6. A one-piece socket for carpets and the like comprising an outer cylindrical wall, an inner cylindrical wall, aplurality of inwardly extending spring fingers connected at their outer ends to said inner cylindrical wall, said fingers forming a stud-receiving aperture in said socket, and a connecting web between said cylindrical walls.

7. A one-piece socket for carpets and the like com rising an outer cylindrical wall, an inner cy indrical wall presenting a'plurality of inwardly projecting spring fingers, said fingers having at their inner ends reversely bent edges constituting the wall of a studreceiving aperture and a connecting portion between the bottoms of said cylindrical walls.

8. A socket for carpets and the like formed from a single sheet of metal and comprising a cylindrical wall presenting a plurality of inwardly extending stud-engaging fingers, said fingers resiliently displaceable either upwardly or downwardly and disposed to enlarge the stud-receiving aperture on either upward or downward displacement thereof, and a second cylindrical wall surroundin said first cylindrical wall and connected t creto.

9. A carpet fastener socket comprising a one-piece casing including a cylindrical wall,

`and a plurality of resilient fingers extending inwardly from the upper part of said wall, said fingers curved slightly downwardly from said wall, then upwardly and terminating about the periphery of a stud-receiving aperture, said inner ends lying iii the same general plane as the top of said wall to permit equal flexing of said fin ers abovey or below said plane, when the heav of a stud is entered or withdrawn from said studreceiving aperture.

10. A carpet fastenersocket presenting a plurality of peripheral prongs adapted to pierce the back of the carpet, a supporting ase adapted to rest on the floor about the base of a stud and a plurality of spring stud-engaging fingers connected to the base substantially above the bottom thereof and arranged to flex either upwardly or downwardly to enlarge .the stud-engaging aperture.

11. A carpet fastener socket comprising a or folds disposed between the two faces of` said body and defining a stud-receiving opening, said undulated or folded portion being split adjacent said opening to provide yielding stud-engaging jaws.

In testimony whereof, I have signed my name to this specification.

' FRED S. CARR. 

